1366 - Incorrect integer value: '' for column 'customer_id' at row 1

insert into whos_online (customer_id, full_name, session_id, ip_address, time_entry, time_last_click, last_page_url) values ('', 'Guest', 'vnf4ubbltdnca7v1bm21qu6lo5', '54.80.140.29', '1534484327', '1534484327', '/catalog/default.php?cPath=57_204&osCsid=r0j6phm8vhjbs4qfsn6548l632')

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